RT9711 概述
The RT9711 is a low voltage, single N-Channel MOSFET high-side power switch, optimized for self-powered and bus-powered Universal Serial Bus (USB) applications. The RT9711 equipped with a charge pump circuitry to drive the internal MOSFET switch; the switch's low RDS(ON), 80mΩ, meets USB voltage drop requirements; and a flag output is available to indicate fault conditions to the local USB controller. Additional features include soft-start to limit inrush current during plug-in, thermal shutdown to prevent catastrophic switch failure from high-current loads, under-voltage lockout (UVLO) to ensure that the device remains off unless there is a valid input voltage present. The maximum current is limited to typically 2.5A in dual ports in accordance with the USB power requirements, lower quiescent current as 25mA making this device ideal for portable battery-operated equipment.

RT9711 技术特性
■RT9711 Compliant to USB Specifications
■RT9711 Built-In N-Channel MOSFET
■RT9711 Typical RDS(ON) : 80mΩ(SOT-23-5), 90mΩ(SOP-8)
■RT9711 Guaranteed 1.5A Continuous Load Current
■RT9711 Wide Input Voltage Ranges : 2.7V to 5.5V
■RT9711 Open-Drain Fault Flag Output
■RT9711 Hot Plug-In Application (Soft-Start)
■RT9711 Under-Voltage Lockout (UVLO)
■RT9711 Current Limiting Protection
■RT9711 Thermal Shutdown Protection
■RT9711 Reverse Current Flow Blocking (no body diode)

RT9711 应用领域
USB Bus/Self Powered Hubs
USB Peripherals
ACPI Power Distribution
PC Card Hot Swap
Notebook, Motherboard PCs
Battery-Powered Equipment
Hot-Plug Power Supplies
Battery-Charger Circuits